From: dblack@...
Date: 2003-05-30T18:48:55+09:00
Subject: Re: Array.extend versus instance.extend

Hi --

On Fri, 30 May 2003, Simon Strandgaard wrote:

> On Fri, 30 May 2003 11:41:21 +0900, dblac wrote:
> >
> > Here's a modification of Guillaume's code that passes your tests:
>
> I ran the test-suite on your code and it failed.

Try again :-)  It shouldn't fail.

Here's what I ran, cut-and-pasted from your message and my message,
plus the TestUnit wrapper:

  module ArrayMisc2A
    def shift_until(klass)
      p = 0
      detect { |x| p += 1 and klass === x }
      slice!(0, p)
    end

    def pop_until(klass)
      p = 0
      reverse.detect { |x| p += 1 and klass === x }
      slice!(-p, p)
    end
  end

  class Array; include ArrayMisc2A; end

  require 'test/unit'

  class TestMe < Test::Unit::TestCase
    def test_shift_until_non_existing_class
      ary = [1, 2, "a", 3, 4, "b", 5, 6]
      res = ary.shift_until(IO)
      assert_equal([], ary)    # BOOM
      assert_equal([1, 2, "a", 3, 4, "b", 5, 6], res)
    end
    def test_pop_until_non_existing_class
      ary = [1, 2, "a", 3, 4, "b", 5, 6]
      res = ary.pop_until(IO)
      assert_equal([], ary)    # BOOM
      assert_equal([1, 2, "a", 3, 4, "b", 5, 6], res)
    end
  end

Output:

  $ ruby shifttwo.rb
  Loaded suite shifttwo
  Started...
  ...
  Finished in 0.002075 seconds.
  2 runs, 4 assertions, 0 failures, 0 errors


David

-- 
David Alan Black
home: dblack@superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav